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129 条记录 (耗时 0.022 秒)

    Magneto-optical recording apparatus using the magnetic field modulation method
    121.
    发明授权
    Magneto-optical recording apparatus using the magnetic field modulation method 失效
    使用磁场调制方法的磁光记录装置

    公开(公告)号：US5331612A

    公开(公告)日：1994-07-19

    申请号：US922854

    申请日：1992-07-31

    申请人： Yoshiteru Murakami ,  Kenji Ohta ,  Akira Takahashi

    发明人： Yoshiteru Murakami ,  Kenji Ohta ,  Akira Takahashi

    IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

    CPC分类号： G11B11/10521 ,  G11B11/10508 ,  G11B11/1051 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10595

    摘要： A magneto-optical recording apparatus which records information through the processes of: first irradiating a light beam onto a magneto-optical recording medium having a recording film; and next applying an external magnetic field that is inverted in response to a recording signal onto the recording film while continuing the first process. In the above arrangement, the intensity of the light beam is dropped upon inversion of the external magnetic field so that information is not recorded. The intensity of the light beam is raised during non-inversion of the external magnetic field so that information is recorded. Further the magneto-optical recording apparatus is provided with a light intensity control device for varying the intensity of the light beam dependent of the lengths of recording bits so that the high-temperature area of the recording film is not widened. Since the width of the recording bits is uniformly maintained, the remaining of the recording bit after overwriting operation can be reduced; thus, the signal quality in reproduction can be enhanced.

    摘要翻译： 一种磁光记录装置，其通过以下处理记录信息：首先将光束照射到具有记录膜的磁光记录介质上; 并且接着在继续进行第一处理的同时将响应于记录信号反转的外部磁场施加到记录膜上。 在上述布置中，光束的强度在外部磁场反转时下降，从而不记录信息。 在外部磁场的非反相期间，光束的强度升高，从而记录信息。 此外，磁光记录装置设置有光强度控制装置，用于根据记录位的长度改变光束的强度，使得记录膜的高温区域不会变宽。 由于记录位的宽度被均匀地保持，所以可以减少重写操作之后的记录位的剩余部分。 因此，可以提高再现中的信号质量。

    Magneto-optical recording medium and method for processing the surface
    122.
    发明授权
    Magneto-optical recording medium and method for processing the surface 失效
    磁光记录介质及表面处理方法

    公开(公告)号：US5328740A

    公开(公告)日：1994-07-12

    申请号：US650283

    申请日：1991-02-04

    申请人： Junichiro Nakayama ,  Yoshiteru Murakami ,  Hiroyuki Katayama ,  Kenji Ohta

    发明人： Junichiro Nakayama ,  Yoshiteru Murakami ,  Hiroyuki Katayama ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  B29C59/02 ,  B29L17/00 ,  G11B5/60 ,  G11B7/26 ,  G11B11/105 ,  B32B3/02 ,  B32B3/10 ,  G11B5/66

    CPC分类号： G11B5/6005 ,  G11B11/1058 ,  G11B11/10584 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/218 ,  Y10T428/24355 ,  Y10T428/31935

    摘要： A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.

    摘要翻译： 本发明的磁光记录介质的表面具有精细和物理的突出和凹陷的纹理。 物理突起和凹陷的形状在介质上的每个径向位置处变化，使得例如在记录介质的内部形成粗糙的突起和凹陷，并且在其外部形成微小的突起和凹陷。 因此，通过外部部分中的空气层，基于恒定的角速度法，从介质旋转的浮动浮动力等于内部部分的浮力。 因此，由于浮动头的浮动高度与介质上的径向位置无关地变得恒定，所以可以在恒定的记录条件下记录信息，从而可以提高记录的准确性。 关于本发明的磁光记录介质的表面的处理方法，例如，在粗糙度小的纹理带用于外部的粗糙度较小的纹理带时，粗糙度大的纹理带用于介质的内部， 其部分。 结果，产生具有上述特性的磁光记录介质。

    Optical head device utilizing partially overlapping light spots to read information from a readout layer
    123.
    发明授权
    Optical head device utilizing partially overlapping light spots to read information from a readout layer 失效
    使用部分重叠的光点从读出层读取信息的光学头装置

    公开(公告)号：US5317555A

    公开(公告)日：1994-05-31

    申请号：US910837

    申请日：1992-07-08

    申请人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta

    发明人： Akira Takahashi ,  Yoshiteru Murakami ,  Junsaku Nakajima ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B13/04

    CPC分类号： G11B11/10545 ,  G11B11/10515

    摘要： A magneto-optical disk has a recording layer whereon recorded bits are formed by the magnetic field modulation method and a readout layer whose axis of easy magnetization is parallel to the recording layer at room temperature, and varies to be perpendicular to the recording layer within a predetermined temperature range between room temperature and the Curie temperature. During reproduction of the recorded bits the first semiconductor laser emits a heating-use light beam to form the first light spot on the readout layer Thus, a ring-shaped region corresponding to the predetermined temperature range exhibits perpendicular magnetic anisotropy and the recorded bits are copied from the recording layer onto the ring-shaped region. As the first light spot is shifted, the ring-shaped region as a readout window of recorded bits is also shifted. Further, the second semiconductor laser emits a reproduction-use light beam such that the second light spot is formed on the readout layer to overlap the first light spot at a rear portion thereof. Consequently, only one recorded bit copied onto the rear portion of the ring-shaped region can be reproduced; therefore, high-quality reproduced signals can be obtained from the magneto-optical disk having information recorded with high density.

    摘要翻译： 磁光盘具有通过磁场调制方法形成记录位的记录层和容易磁化的轴在室温下与记录层平行的读出层，并且在其内变化为垂直于记录层 室温和居里温度之间的预定温度范围。 在再现记录位期间，第一半导体激光器发出加热用光束，以在读出层上形成第一光点。因此，对应于预定温度范围的环形区域呈现垂直的磁各向异性，并且记录的位被复制 从记录层到环形区域。 当第一个光点移动时，作为记录位的读出窗口的环形区域也被移位。 此外，第二半导体激光器发射再现用光束，使得第二光点形成在读出层上，以在其后部与第一光点重叠。 因此，只能再现复制到环形区域后部的一个记录位; 因此，可以从具有以高密度记录的信息的磁光盘获得高质量的再现信号。

    Magneto optical storage device using a multi-layer film of Pt/Co laminated sections
    124.
    发明授权
    Magneto optical storage device using a multi-layer film of Pt/Co laminated sections 失效
    磁光存储器件采用Pt / Co层叠多层薄膜

    公开(公告)号：US5305300A

    公开(公告)日：1994-04-19

    申请号：US888548

    申请日：1992-05-22

    申请人： Kenji Ohta ,  Akira Takahashi ,  Junsaku Nakajima ,  Yoshiteru Murakami

    发明人： Kenji Ohta ,  Akira Takahashi ,  Junsaku Nakajima ,  Yoshiteru Murakami

    IPC分类号： G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10582 ,  G11B11/10593 ,  Y10S428/90

    摘要： A magneto-optical storage device having a configuration wherein a first AlN film, a Pt/co multi-layer film formed by alternately depositing Pt and Co, a second AlN film, and an Al reflective film are successively laminated on a substrate in this order. Assuming that respectively the thickness of the first AlN film is .delta.AlN (1); that of the second AlN film is .delta.AlN (2); that of the Pt single layer is .delta.Pt; that of the Co single layer is .delta.Co; and the total thickness of the Pt/Co multi-layer film is .delta.Pt/Co, each thickness of those layers is set to range within: 50 nm .ltoreq..delta.AlN (1).ltoreq.200 nm; 120 nm.ltoreq..delta.AlN (2).ltoreq.140 nm; 0.6 nm.ltoreq..delta.Pt.ltoreq.1.0 nm; 0.3 nm.ltoreq..delta.Co.ltoreq.0.6 nm; and 15 nm.ltoreq..delta.Pt/Co.ltoreq.20 nm. In accordance with the above arrangement, it is possible to greatly widen the tolerances of the film thicknesses of the first and second dielectric layers for obtaining a predetermined reflective index as well as a maximum Kerr rotation angle. Consequently, without strictly controlling the film thicknesses of the first and second AlN films, a magneto-optical storage device with stable performance suitable for practical use can be produced easily.

    摘要翻译： 具有这样一种结构的磁光存储装置，其中第一AlN膜，通过交替沉积Pt和Co形成的Pt / co多层膜，第二AlN膜和Al反射膜依次层叠在基板上 。 假设第一AlN膜的厚度分别为（Δ）AlN（1）; 第二AlN膜的厚度为（Δ）AlN（2）; Pt单层为（delta）Pt; Co单层为（delta）Co; 并且Pt / Co多层膜的总厚度为（delta）Pt / Co，这些层的每个厚度设定在：50nm <=（delta）AlN（1）<= 200nm的范围内; 120nm <=（delta）AlN（2）<= 140nm; 0.6nm <=（delta）Pt <= 1.0nm; 0.3nm <=（delta）Co <= 0.6nm; 和15nm <=（delta）Pt / Co <= 20nm。 根据上述结构，可以大大拓宽第一和第二介质层的膜厚的公差，以获得预定的反射率以及最大的克尔旋转角。 因此，在不严格控制第一和第二AlN膜的膜厚的情况下，可以容易地制造出具有适合于实际应用的稳定性能的磁光存储装置。